MESON Chess Problem Database

Problem Display
PID: 208946 (1R6/K2R1pr1/8/2p3qb/2p1N3/2P3pN/4k1P1/3n2Q1 w - - 0 1)

Ferreau, Wilhelm

Deutsche Schachblatter, 1936

1R6/K2R1pr1/8/2p3qb/2p1N3/2P3pN/4k1P1/3n2Q1

#2

8 + 9

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qd2
      • 2.Rxd2#
    • 1...Qe3
      • 2.Qxd1#
    • 1...Qf4
      • 2.Sxf4#
    • 1...Qh4
      • 2.Rd2#
    • 1...Qf6
      • 2.Rd2#
    • 1...Qe7
      • 2.Sf4#
    • 1...Qd8
      • 2.Sf4#
    • 1...Qg4
      • 2.Rd2#
    • 1...Qd5
      • 2.Sf4#
    • 1...Qe5
      • 2.Rd2#
    • 1...Qf5
      • 2.Rd2#
    • 1...Qg6
      • 2.Sf4#
      • 2.Rd2#
    • 1...Bg4
      • 2.Sxg3#
    • 1...Sxc3
      • 2.Sxc3#
    • 1...Se3
      • 2.Rd2#
  • Tries
    • 1.Shxg5?
      • threat
        • 2.Sxg3#
        • 2.Rd2#
      • 1...Rxg5
        • 2.Rd2#
      • 1...f5
        • 2.Sxg3#
      • 1...f6
        • 2.Sxg3#
      • 1...Sf2!
    • 1.Rb2+?
      • 1...Qd2
        • 2.Sf4#
        • 2.Rbxd2#
        • 2.Rdxd2#
      • 1...Sxb2!
  • Keys
    • 1.Re8!
      • threat
        • 2.Sxg3#
      • 1...Qd5
        • 2.Sf4#
      • 1...Qe3
        • 2.Qxd1#
      • 1...Qe7
        • 2.Sf4#
      • 1...Qe5
        • 2.Rd2#
      • 1...Se3
        • 2.Rd2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 9
  • Sets
    • Q(f);N_GUARD::R1(G),XQ(f)
    • Q(f);SBLOCK::QAB1(A),XS(a)
    • Q(f);N_GUARD::S(D),XQ(f)
    • Q(f);N_GUARD::R1(G)
    • Q(f);N_GUARD,P_PINR(G)::S(D)
    • Q(f);N_GUARD::S(D)
    • B(g);S_CUTQ(f)::S(E),XP(c)
    • S(a);XP(C)::S(E),XS(a)
    • S(a);S_CUTQ(f)::R1(G)
  • Tries
    • Try
      • S(D);XQ(f)
      • Threat
        • DUALS(2)
      • Vars
        • R(i);XS(D)::R1(G)
        • P(h);P_PINR(G)::S(E),XP(c)
      • Refutation
        • S(a);
    • Try
      • R(H);CHECK
      • Refutation
        • S(a);XR(H)
  • Actual
    • R(H);
    • Threat
      • R(H)+S(E),DCHECK,XP(c)
    • Vars
      • Q(f);N_GUARD::S(D)
      • Q(f);SBLOCK::QAB1(A),XS(a)
      • Q(f);N_GUARD,P_PINR(G)::S(D)
      • Q(f);N_GUARD::R1(G)
      • S(a);S_CUTQ(f)::R1(G)
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